its not for a mustang but i figured i would show it off anyways. Its for a Blazer the box is 6.0 cu ft tuned to 44hz Its for 2 12" L7 subs. I built it for a guy on another forums.

http://webpages.charter.net/allen415/090306/

 

Square. Hope you have some L7s going in there.

I have those in my Mustang. Though I had a PITA trying to find a box that would fit. Since I'm too lazy to build one. Actually got one with enough sqft inside and took the router to make it square sub openings.

Try this. Don't know if it'll sound good with that much open space, but in a trunk it's great. Put it up on feet, and have the speakers face the floor. Definately makes a powerful boom

 

He plans on firing the sub and port up.

 

i personally would have put a divider between the two and given each its own port

 

Why is that? He wants to to be as loud as possible? So for that you will need a common chamber with a single port. If he wanted the little sq kicker has then i would have done divided box with an ports in the center. He dosent care how it sounds. The box is tuned to 44hz for gods sake

 

Is this a "one note box" or a daily box?

 

1 note. ive acutally rebuilt the box with more port area has 100 sqin of port now.